How can you do square foot pricing on residential new construction? It seems like there are too many variables. Even if your square foot pricing only includes code required minimums, there's still lots of things that could vary what it would cost to wire a new house. Something as simple as type of heat, size of the rooms or number of bathrooms could change the amount of time and material you would use.

Am I missing something here? Has anyone had good luck using square foot pricing for residential new construction?